The pictured stretch of the Goldstream river was transformed into a neon glowing green river using an additive called Fluorescein. Although the suspect has not been caught, the pollution prank appears to be the work of pranksters... Are glowing green rivers simply the latest form of graffiti?

The pranksters were obviously knowledgeable because Fluorescein is a non-toxic synthetic compound. Having said that, the prank is still likely to upset eco activists and local authorities.